Photosensitive unit

A photosensitive unit comprising:

• a rotatable photosensitive member;
• a frame configured to hold the photosensitive member;
• a charging roller provided to be movable between a contact position and a separation position and configured to charge a surface of the photosensitive member by being subjected to application of a voltage at the contact position, the charging roller being in contact with the surface of the photosensitive member at the contact position and being separated from the surface of the photosensitive member at the separation position;
• an urging portion configured to urge the charging roller in a direction from the separation position toward the contact position;
• a rotary member configured to rotate by receiving input of a driving force;
• a separation member comprising an engagement portion capable of engaging with the rotary member, wherein the separation member is configured to hold the charging roller at the separation position against an urging force of the urging portion in a state in which the engagement portion is engaged with the rotary member, and, in a case in which the rotary member rotates, the separation member swings in accordance with rotation of the rotary member, engagement between the engagement portion and the rotary member is released, and a state in which the charging roller is held at the separation position is cancelled;
• an abutting portion provided on the separation member;
• and
• an abutted portion that is provided on the frame and that is abutted by the abutting portion in a case in which the separation member moves in a direction to increase a distance between a swing center of the separation member and a rotation center of the rotary member in a state in which the engagement portion is engaged with the rotary member.